54 MUSTARD FAMILY. 



7. CHEIRANTHUS, WALLFOWER. (Cheiri is the Arabic name.; 

 Like Stocks, hut slightly if at all hoary, and the flowers orange, hrown-red 

 dish, or yellow. 1J. 



C. Cheiri, COMMON- WALLFLOWER. Cult, from S. Eu., not hnrdy N.. 

 n much-prized house-plant ; stem woody, crowded with the narrow and pointed 

 entire leaves. 



8. ERYSIMUM. (Name from Greek, and meaning to draw blisters, from 

 the acridity.) 



E. asperum, WESTERN WALLFLOWER. Wild from Ohio W. & S. ; like 

 the wild state of the Wallflower, with bright yellow or orange flowers, but the 

 seeds are different, and the long pods quite square in the cross-section ; the 

 leaves somewhat toothed and hoary, (a) 1J. 



E. cheiranthoides, TREACLE-MUSTARD or WORMSEED MUSTARD. 

 A rather insignificant annual, wild or run wild in waste moist places, with slen- 

 der branches, lanceolate almost entire leaves, and small yellow flowers, followed 

 by shortish and obscurely 4-sided pods on slender spreading pedicels. 



9. BARB ARE A, WINTER-CRESS. (The Herb of Santa Barbara.) 

 Different from the last genus in the seeds, divided leaves, and in the general 

 aspect. Leaves used by some as winter salad, but bitterish. 1| 



B. vulgaris, COMMON W. or YELLOW ROCKET. Smooth, common in 

 old gardens and other ricli soil, with grcerulyratc leaves, and bright yellow 

 flowers, in spring and summer ; pods erect, crowded in a dense raceme, much 

 thicker than their pedicels. 



B. praBCOX, EARLY W. or SCURVY-GRASS. Cult, from Penn. S. for early 

 salad, beginning to run wild, probably a variety of the last, with more numerous 

 and narrower divisions to the leaves ; the less erect pods scarcely thicker than 

 their pedicels. 



10. ARABIS, ROCK-CRESS. (Name from Arabic.) Fl. spring and 

 summer. Leaves mostly simple and undivided. 



* Wild species, on rocks, frc. : flowers white or whitish, not showy, (a) 



A. lyrata, Low R. A delicate, low, nearly smooth plant, with a cluster 

 of lyrate root-leaves ; stem-leaves few and narrow ; bright white petals rather 

 conspicuous ; pods slender, spreading. 



A. hirstlta, HAIRY R. Strictly erect, l-2 high; stem-leaves many 

 and sagittate ; small greenish-white flowers and narrow pods erect. 



A. Isevigata, SMOOTH R. Erect, l-2 high, glaucous; upper leaves 

 sagittate ; flowers rather small ; pods 3' long, very narrow and not very flat, 

 recurving ; seeds winded. 



A. Canadensis, CANADIAN or SICKLEPOD R. Tall, growing in ravines ; 

 stem-leaves pointed at both ends, pubescent; petals whitish, narrow ; pods 3 

 long, scythe-shaped, very flat, hanging ; M-rds broadly winged. 



* * Wild, on river banks : flowers pink-purple, rather showy. 1J. 



A. hesperidoides, ROCKET R. Smooth, erect, l-3 high; with 

 rounded or heart-shaped long-petioled root-leaves, ovute-laiieeolute stcm-lenven 

 (2' -6' long), the lower on a winded petiole or with a pair of small lateral 

 lobes; petals long-clawed ; pods spreading, narrow : seeds windless. Bunks of 

 the Ohio and S. \V. 



* * * Garden species : flowers white, shoicy. U 



A. alpina, ALPINE R., and its variety ' A. ALBIDA, from Eu., low and 

 tufted, hairy or soft-downy, arc cult, in gardens ; fl. in early spring. 



11. CARDAMINE, BITTER-CRESS. (Ancient Greek name.) U 



C. hirstlta, SMALL B. A low and branching insignificant herb, usually 

 not hairy, with slender fibrous root, pinnate leaves, the leaflets angled or' 

 toothed, and small white flowers, followed by narrow upright pods : common in 

 moist soil, 11 spring and summer. 



